In a series of floating seaweed farms off the coast of Bali, Indonesia, a catamaran travels back and forth through lines of dangling red algae. Custom technology on board automatically harvests and replants the seaweed, which quickly grows several feet long. The system is designed to help the tiny seaweed industry scale up—and to capture some of seaweed’s potential to help fight climate change.

Image: James Lee, Unsplash